Suborder:
|
Tornoceratina
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Superfamily:
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Karagandoceratoidea
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Family:
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Karagandoceratidae
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Genus:
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gen.nov.II aff.Karagand. |
Qualifier:
|
sy |
Author:
|
Bartzsch & Weyer 1988,p.135
|
Valid:
|
Masonoceras Work & Manger (TAX6684 ) |
Lower Boundary:
|
S.isosticha,upper S.crenulata Z. base [0, 355 million years
|
Upper Boundary:
|
KAK Kassini top, 353 million years
|